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Hálslón Reservoir
The Hálslón Reservoir () is a storage reservoir in Eastern Iceland on the Jökulsá á Dal River. The reservoir stores water for use in hydroelectricity production with the Kárahnjúkar Hydropower Plant. The reservoir was formed by three different concrete-faced, rock-filled embankment dams: the Kárahnjúkastífla Dam, the Desjarárstífla Dam and the Sauðárdalsstífla Dam . Dams The Kárahnjúkastífla Dam is 193m tall, 730m long and straddles the river. It is made of 8.5 million cubic meters of material, making it the largest dam of its type in Europe. Construction on the dam began in April 2003 and was completed in November 2006. The Kárahnjúkastífla Dam does not create the reservoir alone, as the dam is higher in elevation than the two valleys that flank the river valley. To create the desired level, auxiliary or saddle dams were built. The 60m tall and 1,000m long Desjarárstífla Dam is adjacent and to the east of the Kárahnjúkastífla Dam. The Sauðárdalsstí ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iceland
Iceland is a Nordic countries, Nordic island country between the Atlantic Ocean, North Atlantic and Arctic Oceans, on the Mid-Atlantic Ridge between North America and Europe. It is culturally and politically linked with Europe and is the region's westernmost and most list of countries and dependencies by population density, sparsely populated country. Its Capital city, capital and largest city is Reykjavík, which is home to about 36% of the country's roughly 380,000 residents (excluding nearby towns/suburbs, which are separate municipalities). The official language of the country is Icelandic language, Icelandic. Iceland is on a rift between Plate tectonics, tectonic plates, and its geologic activity includes geysers and frequent Types of volcanic eruptions, volcanic eruptions. The interior consists of a volcanic plateau with sand and lava fields, mountains and glaciers, and many Glacial stream, glacial rivers flow to the sea through the Upland and lowland, lowlands. Iceland i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reservoir
A reservoir (; ) is an enlarged lake behind a dam, usually built to water storage, store fresh water, often doubling for hydroelectric power generation. Reservoirs are created by controlling a watercourse that drains an existing body of water, interrupting a watercourse to form an Bay, embayment within it, excavating, or building any number of retaining walls or levees to enclose any area to store water. Types Dammed valleys Dammed reservoirs are artificial lakes created and controlled by a dam constructed across a valley and rely on the natural topography to provide most of the basin of the reservoir. These reservoirs can either be ''on-stream reservoirs'', which are located on the original streambed of the downstream river and are filled by stream, creeks, rivers or rainwater that surface runoff, runs off the surrounding forested catchments, or ''off-stream reservoirs'', which receive water diversion, diverted water from a nearby stream or aqueduct (water supply), aq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jökulsá á Dal
Jökulsá á Dal, (, ) also called Jökulsá á Brú or Jökla, is a river in the northeast of Iceland. Of its original length of 150 km (making it the longest river in Iceland's Eastern Region), 25 km are now part of the artificial lake Hálslón created for the Kárahnjúkar Hydropower Plant. This reduced the river's discharge from 205 m³/s to 95 m³/s, consisting of water from tributaries below the dam. Before construction of the dam, the river used to transport approximately 120 t of sediment per hour into the North Atlantic. The water from the reservoir is now redirected into Lagarfljót. Due to the strong current, fording of the Jökulsá á Dal isn't possible. The first bridge across it was built in 1625. The bridge on Iceland's Route 1 (''Hringvegur'') was built in 1994, when the road to Egilsstaðir was upgraded. The previous bridge still stands, some distance downstream. In the novel '' Independent People'' by Icelandic author Halldór Laxne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydroelectricity
Hydroelectricity, or hydroelectric power, is Electricity generation, electricity generated from hydropower (water power). Hydropower supplies 15% of the world's electricity, almost 4,210 TWh in 2023, which is more than all other Renewable energy, renewable sources combined and also more than nuclear power. Hydropower can provide large amounts of Low-carbon power, low-carbon electricity on demand, making it a key element for creating secure and clean electricity supply systems. A hydroelectric power station that has a dam and reservoir is a flexible source, since the amount of electricity produced can be increased or decreased in seconds or minutes in response to varying electricity demand. Once a hydroelectric complex is constructed, it produces no direct waste, and almost always emits considerably less greenhouse gas than fossil fuel-powered energy plants. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kárahnjúkar Hydropower Plant
Kárahnjúkar Hydropower Plant ( ), officially called Fljótsdalur Power Station ( ) is a hydroelectric power plant in Fljótsdalshérað municipality in eastern Iceland, designed to produce annually for Alcoa's Fjarðaál Aluminium smelting, aluminum smelter to the east in Reyðarfjörður. With the installed capacity of , the plant is the List of power stations in Iceland, largest power plant in Iceland. The project, named after the nearby Kárahnjúkar mountains, involves damming the rivers Jökulsá á Dal and Jökulsá í Fljótsdal with five dams, creating three reservoirs. Water from the reservoirs is diverted through of underground water tunnels and down a vertical penstock towards a single underground power station. The smelter became fully operational in 2008 and the hydropower project was completed in 2009. The Kárahnjúkar Dam ( ) is the centrepiece of the five dams and the largest of its type in Europe, standing tall with a length of and comprising of material. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete
Concrete is a composite material composed of aggregate bound together with a fluid cement that cures to a solid over time. It is the second-most-used substance (after water), the most–widely used building material, and the most-manufactured material in the world. When aggregate is mixed with dry Portland cement and water, the mixture forms a fluid slurry that can be poured and molded into shape. The cement reacts with the water through a process called hydration, which hardens it after several hours to form a solid matrix that binds the materials together into a durable stone-like material with various uses. This time allows concrete to not only be cast in forms, but also to have a variety of tooled processes performed. The hydration process is exothermic, which means that ambient temperature plays a significant role in how long it takes concrete to set. Often, additives (such as pozzolans or superplasticizers) are included in the mixture to improve the physical prop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Embankment Dam
An embankment dam is a large artificial dam. It is typically created by the placement and compaction of a complex semi-plastic mound of various compositions of soil or rock. It has a semi-pervious waterproof natural covering for its surface and a dense, impervious core. This makes the dam impervious to surface or seepage erosion. Such a dam is composed of fragmented independent material particles. The friction and interaction of particles binds the particles together into a stable mass rather than by the use of a cementing substance. Types Embankment dams come in two types: the earth-filled dam (also called an earthen dam or terrain dam) made of compacted earth, and the rock-filled dam. A cross-section of an embankment dam shows a shape like a bank, or hill. Most have a central section or core composed of an impermeable material to stop water from seeping through the dam. The core can be of clay, concrete, or asphalt concrete. This type of dam is a good choice for site ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jökulsá í Fljótsdal
{{Disambiguation ...
Jökulsá (literally ''glacier river'') is the name of several rivers in Iceland. * Jökulsá á Dal, also known as ''Jökulsá á Brú'' or ''Jökla'' * Jökulsá á Fjöllum, the second longest river in Iceland * Jökulsá á Breiðamerkursandi * , which becomes Lagarfljót * * * Jökulsá í Borgarfirði eystri, a river *Jökulsá í Fáskrúðsfirði, a small river *Jökulsá á Flateyjardal, a small river See also *List of rivers of Iceland *Austari-Jökulsá *Vestari-Jökulsá Vestari-Jökulsá or Jökulsá vestri (English: Western Glacier River) is a glacier river in Skagafjörður, Iceland. It originates in the northwest corner of Hofsjökull and is formed from many branches that fall together and flow northward. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
